Diving into Power... Cable recs for my system and ears....?

The sound of an audio component starts with the power supply. What comes out of the wall outlet is of no consequence. Power conditioners are useless and a waste of money. Let the brick throwing begin!

You will get very significant improvements with direct lines, amp power cord, and power conditioner for your non-amp components, then get power cords for your components. 

Completely agree with @ghdprentice.  Dedicated lines can be a very cost effective upgrade relatively speaking, and you should get at least two lines installed so you can plug your noisy digital equipment into one outlet and everything else into the other.  For power cables there are good direct sellers like Ice Age (Frankencable), Veritas, Triode Wire Labs, Snake River Audio, etc. who offer generous trial periods and you’re only out return shipping in most cases if they don’t work out.  There are reviews out there on all of them so you can see which ones exhibit the sound characteristics you’re looking for and have at it for very low risk.  If you’re budget restricted something like this Audience aR2p power conditioner is something you can plug your power strip into and at least get some good power conditioning to all your components on the cheap (I did something similar to this).  Just some thoughts FWIW, and best of luck.

https://www.usaudiomart.com/details/650251239-audience-ar2p-tod-power-conditioner/

The people making and selling power cords are as honest as a 3-card monte dealer.

+1 to the two experienced audiophiles responses above. And to the poster above who is not an audiophile, well, one of these days he might wander out far enough and discover that there is no edge of the Earth to fall off.

-What is the most important in regards to impact to overall sound if I were to upgrade the power cords? My guess its: 1: Amp.... 2: DAC... 3: Streamer... is that right? Or is it the opposite? 

IME the power cord that made the biggest difference was the one that fed the power conditioner. I had read that before though, so it wasn't such a huge revelation. Before that happens your order looks like it would win most polls.

What also may happen is your last upgraded power cord in the system, wherever it is, may seem like the biggest difference, but that is just because if it was the last one to get upgraded it was the last big bottleneck. 

This is why Shunyata will suggest with a certain budget a larger impact will be gained with all cords replaced with lower end Venom's instead of say a few Alpha's used in conjunction with stock cords. 

I suppose you have Fidelium speaker cables as well? 

"There is NO engineering/scientific proof that power cords affect the sound of audio components. All there is are anecdotal subjective impressions by "golden ear" ’philes. I trust engineering evidence. It’s your money. If you want to throw it away go ahead."

If that's the case, then you don't know one way or another. If science is so important to you, then answer this one question. Can you reference a single review, test, evaluation, study, comparison, etc..., that was done using real science, not junk science, on any piece of audio equipment ever made by human hands? You'll respond to this post, but you will never list a single example of real science. Why? Because your position has nothing to do with cables. You will never accept any test, no matter how well done, unless the test shows the results you want to see. Its not about getting to the truth. The real issue is you don't WANT the cables to make a difference. That's why you'll never reference a real test, and you will never do one yourself. 50 years from now, you'll still be making the same, broken down arguments. If you think I'm wrong, all you have to do is give me one example that you'll stand by. I won't hold my breath.